Single-to-balanced multi-coupled line LTCC bandpass filters with compact size and impedance matching capability

Chin Lung Tsai, Yo Shen Lin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

This paper presents the impedance matching capability of the single-to-balanced multi-coupled line LTCC bandpass filter. The proposed single-to-balanced filter is composed of a three-line coupled-line of λ/24 electric length with shunt capacitors loaded at suitable positions, which make them realizable in a LTCC chip size of 2012. Transformations from the 50 Ω single-ended port to balanced port impedances of 50 Ω, 100 Ω, and 150 Ω are demonstrated. Besides, broadside-coupled technique and meandered line are used for further size reduction. Specifically, a 2.4 GHz single-to-balanced filter with 50 Ω : 50 Ω impedance transformation ratio is achieved in a LTCC chip size of 1608, which is the smallest one in the market as far as we know.

Original languageEnglish
Title of host publicationEuropean Microwave Week 2009, EuMW 2009
Subtitle of host publicationScience, Progress and Quality at Radiofrequencies, Conference Proceedings - 39th European Microwave Conference, EuMC 2009
Pages1144-1147
Number of pages4
DOIs
StatePublished - 2009
EventEuropean Microwave Week 2009, EuMW 2009: Science, Progress and Quality at Radiofrequencies - 39th European Microwave Conference, EuMC 2009 - Rome, Italy
Duration: 28 Sep 20092 Oct 2009

Publication series

NameEuropean Microwave Week 2009, EuMW 2009: Science, Progress and Quality at Radiofrequencies, Conference Proceedings - 39th European Microwave Conference, EuMC 2009

Conference

ConferenceEuropean Microwave Week 2009, EuMW 2009: Science, Progress and Quality at Radiofrequencies - 39th European Microwave Conference, EuMC 2009
Country/TerritoryItaly
CityRome
Period28/09/092/10/09

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